What is the achievement of monsieur boulanger?

Monsieur Boulanger is often credited with popularizing the modern concept of the café and bistro in France during the 18th century. His establishment, which served food and drink, laid the groundwork for the social and gastronomic culture associated with French cafés today. Additionally, he is noted for his role in the development of a more casual dining experience, making meals accessible to a broader public.